Teeeitoey



(No Model.)

P. P. VOIGT.

MACHINE FOR MAKING THREADS ON SHEET METAL PIPES.

N. PETERS, Phulo-Lrthogrnphar. Wnshinglun. n. c,

@nurnn tries.

amend.

FERDINAND F. VOIGT, OF VALLA YVALLA, WASHINGTON TERRITORY.

SPECIFICATION forming part of Letters Patent No. 335,727, dated February9, 1886.

Application filed September 9, 1885.

T0 at whom it may concern.-

Be it known that I, FERDINAND F. VoIG'r, of \Valla Walla, county ofValla \Valla, and- Territory of \Vashington, have invented anImprovement in Machines for Making Threads Upon the Ends of Sheet-MetalPipes; and I hereby declare the following to be a full, clear, and exactdescription thereof.

My invention relates to a new anduseful machine for making a spiralthread or head on the ends of sheet-metal pipes and preparing them forjointing together; and my invention consists in the deviceshereinafterde scribed, and pointed out in the claims.

The object of my invention is to prepare for jointing such sheet-metalpipes as are made in sections, and are then put together to the requiredlength, such as conducting waterpipes and common water-pipes, or such asare used in leading water and draining, and

stove-pipes and smoke-stacks of smallersizes.

By the use of myinvention I render the putting together or jointing ofsuch pipes more easy, and when so put together they will stay withoutbeing tied with wire, or being riveted together or otherwise secured,still being easy to separate the several sections and parts whennecessary.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a perspective view of my machine. Fig. 2 isa longitudinal section of one of the followers D, showing theadjusting-nut J and the spring between the nut and hub of thegear-wheel.

A is the frame, upon which are mounted the matrix-clamps B. Theseconsist of annular bands divided into semicircular halves, the upperhalf being hinged at one side, as at b and secured at the other side tothe lower half by means of a swinging lever, b, which is adapted to fitits cross-pin I) over anear or lug, o on the said upper half. Theinterior surface of the matrix-clamps is provided with a spiral groove,0, of the pitch desired to be formed upon the pipe.

D are the followers, consisting of hollow cylindrical oases providedwith stems or shafts d, journaled in boxes E on frames E, mounted uponthe main frame at each end and adapted to slide longitudinallythereon,whereby the followers may be moved back and forth to be SerialNo. 176,641. (No model.)

inserted within the pipe and to be withdrawn therefrom. Revolution isimparted to the said followers by means of suitable gears, F and F,thelatter being splined upon the stems by which the stems d are rotated.The inner ends of the stems d project through the center of thefollowers, and are provided with in clined tangential planes G, whichproject through radial slotsg, made in the inner ends of the followers.The stems d pass loosely through the followers,whereby they may have anindependent longitudinal movement, and yet by reason of their inclinedplanes projecting through slots g they are enabled to rotate thefollowers in the same manner as if feathered therein.

H are die-fra1nes, which are secured inside of the followers in asuitable manner-as by means of the springslz-a11d said frames rest onthe inclined planes G of the stems of the followers. J onrnaled in thetops of the frames are the die-rollers I, provided with one or morebeads or ridges, i, which are adapted to project through the peripheryof the cylindrical followers in suitable slots or openings, d madetherein. Upon the stems d of the followers are adj nsting-nuts J ,whichare adapted to be turned on the stems, to adjust the some in and out ofthe followers, and aftersnch adjustment the nuts are held in a fixedposition against the frame E or end of the follower by suitable springs,P, placed around the stems,

between the nuts and hub or bearing of the gear-wheel F. It will thus beseenthat when the stems are drawn back the inclined planes are forcedagainst the frames of the rollerdies H, whereby said dies are expandedor forced outward radially, and when said stems are moved forward theirinclined planes release the die-frames, and the springs thereof withdrawthe die-rollers from the periphery of the followers.

The sliding movement of the follower-carrying frames E may beaccomplished in any suitable manneras by the, rack and pinion Land maybe fixed at any desired point by means of. suitable stops and levers.(Not shown.)

The operation of the machine is as follows: A section of pipe is placedin the machine, with its ends resting in the matrix-clamp and flush withthe offset M. The matrix-clamp is the nuts J areturned in reversedirection, and,

as they are held from moving away from the followers by the springs P,they force the shaft (1 outward, and thus permit the beaded dierollersto be drawn inward by the springs h. The followers may then be withdrawnfrom the pipe.

In order to accurately fix the beading-rollers to the pitch of thegroove in the interior of the matrix-clamps, I have an offset, M, madeupon the edge of the matrixclamps, which is on the same inclination asthe pitch of the m atriX-groove and joins therewith, so that thefollower can be introduced to such an extent as to carry the bead of itsdie-roller to this offset,where it can be seen that it is in line withand will follow the matriX-grom'e when the follower is rotated. Thefollowers are then rotated for the purpose of making the bead in thepipe. on with some degree of care, in order to accurately fit all theparts and to get a proper start.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The annular matrix-clamps B, having the spiral groove 0 on theirinner surfaces,in combination with the followers D, the expanding beadeddie-rollers mounted therein, the illclined planes and roller-frames, andthe means described for giving longitudinal and rotary movement to thefollowers, substantially as herein described.

2. The hollow cylindrical casings or followers D, having radial slots 9in their inner ends, and the springframes H, within said followers,carrying the beaded die-rollers I, projecting through openings in theperiphery of the fol- This operation should be carriedlowers, incombination with the rotating axial stems d, extending through thefollowers, and having radial-inclined planes G on their inner endsbearing against the roller-frames H, and the nuts J, mounted upon saidstems and adapted to move them longitudinally to expand the beadeddie-rollers, substantially as herein described.

3. The hollow cylindrical casings or followers'D, having radial slots 9in their inner ends, and the spring-frames H,within said followers,carrying the beaded die-rollers I, projecting through openings in theperiphery of the followers, in combination with the axial stems (1,extending through the followers, and having radial-inclined planes G ontheir inner ends bearing against the roller-frames H, the nuts J, bywhich said stems are moved longitudinally, the springs P, and the gearsF, by which the stems and followers are rotated, substantially as hereindescribed.

4. The annular matrix-clamps B, havinginternal spiral groove, 0, of thedesired pitch, said clamp having an offset, M, on its side, having theinclination or pitch of the groove 0, and joining therewith, incombination with the longitudinally-adjustable rotating followers D,having the expanding beaded die-rollers I, substantially as and for thepurpose herein described.

5. The frame A and the two-part annular matrix-clamps B, having internalspiral groove, 0, in combination with the sliding frames E, thefollowers D, having the spring-frames H, with beaded die-rollers I, therotating axial stems d, carrying said followers and mounted in thesliding frames, said stems having the radial-inclined planes G, adaptedto expand the spring-frames H and the die-roller, and the nuts J, bywhich the stems are adjusted, all arranged to operate substantially asand for the purpose herein described.

In witness whereof I have hereunto set my hand.

FERDINAND F. VOIGT.

Vitnesses:

A. REEVES AYREs, F. W. GooDHUE.

